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Brain water diffusion in normal and creatine‐supplemented rats during transient global ischemia
Author(s) -
Wick Markus,
Fujimori Hiroyuki,
Michaelis Thomas,
Frahm Jens
Publication year - 1999
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/(sici)1522-2594(199910)42:4<798::aid-mrm23>3.0.co;2-o
Subject(s) - ischemia , creatine , chemistry , effective diffusion coefficient , medicine , diffusion mri , endocrinology , edema , neuroprotection , magnetic resonance imaging , nuclear magnetic resonance , anesthesia , physics , radiology
Abstract Brain water diffusion in response to transient global ischemia (12 min), reperfusion (60 min), and cardiac arrest was monitored by localized proton magnetic resonance spectroscopy. The trace of the apparent diffusion coefficient tensor (ADC Av ) was determined at high temporal resolution (10 sec) to assess the putative neuroprotective potential of oral creatine (Cr) in rats that received 2.2 g Cr‐monohydrate per kg body weight per day for 10 days (n = 8) relative to controls (n = 9). Cr‐fed rats revealed a statistically significant increase of the cerebral concentration ratio of Cr to choline‐containing compounds (20%). The decrease of the ADC Av value during acute ischemia showed a three‐phasic behavior in line with energy depletion, cytotoxic edema, and brain cooling. In Cr‐fed rats, slightly less severe and mildly delayed diffusion changes during ischemia and similar beneficial trends during early reperfusion did not reach statistical significance. Magn Reson Med 42:798–802, 1999. © 1999 Wiley‐Liss, Inc.